Introduces navigation keycodes.

These four new navigation keycodes are intended to be used to
navigate a tree hierarchy or list of items.  They should be used to
allow the user to advance forward or backward within a list of
sibling items, expand the currently selected item to navigate the
item's children, or back out from the current item to its parent
item or state.

Change-Id: Ie2b85b3e4c682b0698599d7bcf64a53f6a52d776

1 files changed, 16 insertions, 2 deletions

diff --git a/core/java/android/view/KeyEvent.java b/core/java/android/view/KeyEvent.java
index 779560cb15f0..1ac3f4598d94 100644
--- a/core/java/android/view/KeyEvent.java
+++ b/core/java/android/view/KeyEvent.java
@@ -747,8 +747,22 @@ public class KeyEvent extends InputEvent implements Parcelable {
     public static final int KEYCODE_TV_TIMER_PROGRAMMING = 258;
     /** Key code constant: Help key. */
     public static final int KEYCODE_HELP = 259;
-
-    private static final int LAST_KEYCODE = KEYCODE_HELP;
+    /** Key code constant: Navigate to previous key. 
+     * Goes backward by one item in an ordered collection of items. */
+    public static final int KEYCODE_NAVIGATE_PREVIOUS = 260;
+    /** Key code constant: Navigate to next key. 
+     * Advances to the next item in an ordered collection of items. */
+    public static final int KEYCODE_NAVIGATE_NEXT   = 261;
+    /** Key code constant: Navigate in key.
+     * Activates the item that currently has focus or expands to the next level of a navigation 
+     * hierarchy. */
+    public static final int KEYCODE_NAVIGATE_IN     = 262;
+    /** Key code constant: Navigate out key.
+     * Backs out one level of a navigation hierarchy or collapses the item that currently has 
+     * focus. */
+    public static final int KEYCODE_NAVIGATE_OUT    = 263;
+
+    private static final int LAST_KEYCODE = KEYCODE_NAVIGATE_OUT;
 
     // NOTE: If you add a new keycode here you must also add it to:
     //  isSystem()